Microdroplet Generation
Microdroplet Generation - Related Videos
03:20
Real-Time Monitoring of Bacterial Growth Using a Microfluidic Microdroplet Culture System
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2025
Source: Jian, X. et. al., Automated Microbial Cultivation and Adaptive Evolution using Microbial Microdroplet Culture System (MMC). J. Vis. Exp. (2022)This video demonstrates the use of a microfluidic droplet-based platform for real-time monitoring of bacterial growth. By generating uniform droplets containing bacterial suspensions and guiding them through a detection pathway, the system enables continuous optical measurement of cell density to construct a growth curve.
08:20
Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets
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Cited by 9 •
2016
Here, we demonstrate a simple production method for size-controllable, monodisperse, water-in-oil (W/O) microdroplets using a capillary-based centrifugal microfluidic device. This method requires only a small sample volume and enables high-yield production. We expect this method will be useful for rapid biochemical and cellular analyses.
03:42
Adaptive Evolution of Bacteria Using a Microbial Microdroplet Culture System
0 Views •
2025
Source: Jian, X., et al., Automated Microbial Cultivation and Adaptive Evolution using Microbial Microdroplet Culture System (MMC). J. Vis. Exp. (2022).This video demonstrates the use of a microbial microdroplet culture system to drive adaptive evolution of bacteria toward methanol tolerance. By mixing engineered bacterial cultures with a high-methanol stress medium and segmenting them into microdroplets, the system selects for mutants that exhibit improved growth under methanol stress. Through...
04:13
Bioscaffold Fabrication by Electrospraying: A Technique to Generate Microcarrier Scaffolds Derived from Extracellular Matrix of Decellularized Tissue
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2023
This video demonstrates the procedure of extracellular matrix-derived microcarrier fabrication by electrospraying. These microcarriers simulate the native tissue-specific microenvironment and are stable in long-term 3D in vitro cell culture models.
08:18
Automated Microbial Cultivation and Adaptive Evolution using Microbial Microdroplet Culture System (MMC)
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Cited by 1 •
2022
This protocol describes how to use the Microbial Microdroplet Culture system (MMC) to conduct automated microbial cultivation and adaptive evolution. MMC can cultivate and sub-cultivate microorganisms automatically and continuously and monitor online their growth with relatively high throughput and good parallelization, reducing labor and reagent consumption.
FAQs
Droplet formation occurs when interfacial tension, viscous forces, and flow conditions reach a balance that favors separation of a continuous stream. Changing these factors alters how readily the stream breaks into individual droplets. Engineering this balance is essential for producing repeatable droplet sizes and frequencies rather than irregular fluid structures.
Engineers can modify microchannel dimensions, nozzle or flow-focusing geometry, fluid properties, and operating conditions. These variables influence the balance governing breakup, allowing the resulting droplet size and production frequency to be tuned. Controlling them also helps maintain consistent composition, which is important when droplets serve as reaction or processing units.
Channels, nozzles, and flow-focusing geometries provide different physical arrangements for directing fluids and managing the breakup of a continuous stream. Their dimensions and configuration affect the interaction among flowing phases, interfacial tension, and viscous forces. Selecting and adjusting an appropriate geometry gives engineers a practical route to control droplet formation.
Uniform droplets provide more reproducible small-volume environments for processing and experimentation. Consistent size, frequency, and composition help keep conditions comparable from one droplet to the next, supporting reliable emulsification, encapsulation, chemical synthesis, diagnostics, printing, and materials processing. Uniformity therefore connects fluid control with predictable downstream outcomes.
A basic workflow begins by selecting a channel, nozzle, or flow-focusing arrangement suited to the intended fluid process. Engineers then set the relevant fluid properties and operating conditions, while considering channel dimensions. Observing the resulting droplet size, frequency, and composition allows these parameters to be adjusted toward the required output.
The technique is useful when an application benefits from precise handling of small fluid volumes or separated reaction environments. Engineering uses include emulsification, encapsulation, chemical synthesis, printing, diagnostics, and materials processing. It can also reduce reagent consumption, making controlled droplet-based operation relevant to experiments and processes that must use materials efficiently.